About: http://webisa.webdatacommons.org/98051079

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	There are maintenance people who are supposed to clean them, but I have never once seen them do anything other than vacuum.
http://www.w3.org/ns/prov#wasQuotedFrom	cappex.com